Crushing-rolls.



No. 798,415. PATENTED AUG. 29, 1905.

R. K. HUMEHRBY. CRUSHING ROLLS.

APPLICATION FILED NOVY26, 1902 3 SHEETS-SHEET 1.

No. 798,415. FATENTBD AUG. 29, 1905.

R. K. HUMPHREY.

ORUSHING ROLLS.

APPLIUATION FILED Nov 2s, 1902.

SSHEETS-SHBBT 2.

R. K. HUMPHREY.

CBUSHING ROLLS.

APPLIGATION FILED NOV, 26, 1902.

3 SHEETS-SHEET 3 mnnzw. a. GRAHAM ca.. Fumo-Lrmnsmwnsns, wAsnwemu. u c.

ROBERT K. HUMPHREY, OF DENVER, COLORADO.

CRUSHING-ROLLS.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application led November 26, 1902. Serial No. 132.971.

To roll whom, t may concern;

Be it known that I, ROBERT K. HUMPHREY, a citizen of theUnited States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Crushing-Rolls; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in ore-crushing rolls7 and particularly to that class of such machinery which is designed to pulverize hard rocks and ores. This machine is designed to treat ores and rocks which have already been crushed in a rock-breaker and is provided with two steel rolls for reducing the material to a finer and comparatively even mesh.

It consists in an ore-crushing mechanism comprising a pair of crushing-rolls, one of which is rigidly secured in the crusher, while the other is held in position by spring-blocks and means for securing the shafts of the said rolls in their bearings, so that they cannot be jarred loose.

It further consists in a crushing mechanism having a fixed roll and a movable or yieldingly mounted roll, arms or pillowblocks for carrying the said yielding roll, and means for adjusting the said pillow-.blocks so as to properly aline the shafts of the two rolls at any time.

The invention also consists in an ore-crushing mechanismin which a stationary roll is employed and a movable roll, the movable roll being supported by arms pivotally mounted in the frame, cushion-blocks backing said arms for holding the movable roll in proper relation to the stationary roll, and means for retracting the cushion-blocks a sufficient distance to permit the rolls to separate when it is desired to permit the material fed to the crusher to pass between the rolls in an uncrushed condition, as sometimes happens when some part of the machinery is out of order and the crushing operation must be stopped for a short time.

It further consists in certain other novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure l is a top plan view of my improved crushing-rolls. Fig. 2 is a side elevation of the same, a portion thereof being removed and shown in section. Fig. 3 is a detail sectional view through one of the bearings of a crushingroll shaft. Fig. 4 is a view in elevation of the cushion-blocks and the mechanism which.

carries them. Fig. 5 is a vertical sectional view through the crusher upon the line of the shafting which carries the arms supporting the movable roll, a portion of the mechanism being shown in elevation.

This invention has for its object the improvement of machinery for pulverizing hard rocks and ores. This result is accomplished by passing material which has already been crushed in a rock-breaker between a pair of narrow or wide faced steel rolls, so as to reduce the material to a comparatively fine and even grade.A While machines have been in use for many years for accomplishing this purpose, they have not been greatly improved, but are substantially asthey were built years ago. Rolls in Crushers of this kind constantly develop defects, and the present invention is designed to overcome difficulties and make a more perfect and more easily adjusted device.

In a practical form the crusher is made up of a suitable frame or base l, which is provided with bearings at 2 to receive the shaft 3 of a stationary crushing-roll 4. The base l at this point is somewhat wider than it is opposite theother crushing-roll 5. The crushing-roll 5 has a shaft 6, which is supported in bearings 7 carried by pivoted arms or pillowblocks 8. These pillow-blocks extend downwardly from the bearing 7 upon each side of the casing l and are secured to a cross-shaft 9, mounted in. adjustable bearings 10.

In crushing-rolls of this character it is found exceedingly difficult to hold the caps of the bearings in position by means of nuts or jam-nuts in the usual way. Especially are such securing means liable to become loosened where one of the rolls is yieldingly mounted and is liable to be spread apart by any foreign substance passing between the rolls and forced into position again with a hammering blow of the spring cushion-blocks',l Y.

which will be hereinafter described. In order to secure the caps of the bearings in proper position, so that they will not be jarred loose by the operation of the machine, I employ U-shaped straps, as 11 and 12, which are placed around the caps 13 and 14 of the bearings. These straps are held in position upon the periphery of the bearing-caps by means of lugs 15, projecting from the edges of the said caps. In the case of the caps 13 for the shaft 3 the ends of the strap 11 are passed through openings in the base-frame 1, as clearly illustrated in Fig. 3, and a key lor wedge 1.6 is passed through slots 17, formed .in the said strap 11, the said key passing be hind the bearing 2 and when forced tightly into position drawing the cap 413 snug y in place. ed positions by means of ar set bolt or screw, as 18. Such a means for holding the cap in place will not be easily shaken or jarred from its position, and yet can be easily removed when the bearing is to be taken apart. The caps 14 are secured to the pivoted pillowblocks 8 in a similar man-ner, the straps 12 having their ends projecting through openings in said pillow-blocks, while keys 19 are slipped through slots therein and held in their tightened positions b y means of set bolts or out of alinement.

screws 20. Thus it will be seen that the shafts 3 and 6 will be held in bearings which cannot be easily shaken loose. Another difficulty in machines of this kind arises from the fact that the shafts of the rolls are likely `to get To obviate this difficulty, I supply the Crusher with means for adjusting the bearings of one shaft with :respect to the bearings of the other shaft. As described, a shaft 9, which carries the pillowblocks 8, passes through bearings 10. These bearings 10 are movably mounted in guideways 21 in the main frame 1. They are so arranged that keys 22 and 23 can be forced below and above said bearings, respectively, as illustrated in Figs. 2 and 5 of the drawings. These keys are preferably inserted from opposite sides of the bearing-blocks 10, and the pillow-blocks can thus be raised or lowered on either side of the machine, as reuired. As shown i-n Figs. 1 and 5 of the drawings, the shaft 3 carries a pulley 24,

which `is quite large, while the shaft 6 carries a ulley 25, which is much smaller. These pu leys are arranged upon opposite sides of the machine and drive the crushing-rolls 4 and 5. The reason for making these pulleys of different sizes is that the rolls will not always present the same surface to each other, but will be constantly changing their relation. The pulley ends of the shafts because of the weight of said pulleys will cause the bearingsupon the side of the machine next to said pulleys to wear more rapidly than the bearings at the o pposite ends of the The key 16 may be held in its adjust-F shafts from the said pulleys, and of course the shaft carrying'l the large pulley 24 will be heavier at its pulley end than the other shaft. It will thus be seen that the bearings will so wear that the shafts will fall away from alinement in opposite directions on each side of the machine, and unless there is means for adjustment provided portions of the tires of the rolls 4 and 5 will overhang the opposing tire and large ridges or projections will be formed, which heretofore have had to be removed by the cold-chisel. In the present device as soon as the shaft 3 begins to drop a little -out vof alinement the bearing-boxes 10, supporting the shaft 6, can be adjusted so as to lower the shaft 6 correspondingly. Thus the peripheries of the crushing-rolls will always be kept exactly opposi-te each other and will necessarily wear evenly throughout. It will bevobserved that this means is exceedinglysimple for adjusting the shafts and vcan be quickly manipulated. I/Vhen it is necessary to take the rolls from the machine and to put on new tires, the bearings are rebabbitted in the :usual manner, and the shafts Vare then replaced in their correct horizontal position. In case of an accident in the mill in which said crushing-rolls are used which necessitates the stopping of the machinery the feed of ore to these rolls cannot be stopped Aimmediately and quickly fills up the housing of the rolls. It is a long and tedious Vjob to remove all of this surplus feed of ore from the rolls, which must be done before they can be started again, and thus the whole mill must be shut down until they can be cleaned out. machine the roll 5 can be quicklyremoved from the roll 4 a sufiicient distance to permit this feed of ore to pass between -them in an uncrushed condition, and thus prevent the clogging of the crushers housing. The operation of the rolls can be as quickly resumed when the difficulty in the mill has been obviated.. The rolls 4-and 5 are spaced just the proper distance apart by means of compression-springs which are mounted in casings 26, supported by brackets 27 3 mounted on each side of the machine, and the tension on the said springs is adjusted by means of screws 28, the said screws and the springs'being interposed between the cap -securing straps 1 1 .and 12-on each side of the machine. These springs thus are of sufficient .tension to hold the pi-llow-blocks 8 against the spring cushion-blocks behind them.

The cushion-blocks 29 may be one or more in number, and I have shown in the drawings two of said blocks, one for each pillow-block 8.

ably consist of plates or caps 30 `and 31, between which are arranged a number of powerful springs 32. 'Each of the caps 31 is By the construction of the present The cushion-blocks 29 prefer'-- IOO IIO

formed with a projecting lug or base 33, which fits into a semicircular bearing 34, formed in each of the pillow-blocks 8. Each of the cap-plates 30 engages a screw bolt or shaft 35, which is provided with an eye 36 at its lower end, said eye being pivotally mounted upon the end of a shaft 37, which extends transversely of the machine. This shaft 37- is carried by ayoke 38, which has depending lugs 39, which are perforated and engage a supporting-shaft 40. The shaft 40 is mounted in standards 41, projecting upwardly from the base-plate of the frame l, the said standards being arranged just inside the depending lugs 39 of the yoke 38 and preventing any lateral movement of the said yoke, @ne end of the shaft 40 projects beyond the cushion-blocks and has secured to it a lever 44, by which it may be rotated. Each of the standards 41 is provided with upwardlyprojecting limiting-lugs 42 and 43, which engage the shaft 37 of the cushion-blocks and limit its movement around the shaft 40.

When the roll 5 is to be held to its work, in coperation with the roll 4, the shaft 4() is so rotated that the shaft 37 is thrown toward the roll 5. As illustrated in Fig. 2, when the shaft 37 is in this position the limiting-lugs 43 permit the said shaft to fall a little below the plane passing through the axis of the shaft 40 and the axis of the bearing 34 of the pillow-blocks. Thus gravity will hold the parts in this position, and the cushion-blocks will hold the roll 5 to its work. If, as above described, anything happens to the mill, so that it is necessary to stop the crushing-rolls, the free flow of the feed of ore between the rolls is quickly accommodated by throwing the lever 44 outwardly, the shaft 40 thus lbringing the shaft 37 against the limitinglugs 42 and permitting the pillow-blocks 8, with the roll 5, to fall away from the roll 4. lt will thus be apparent that the roll 5 Acan be thrown into and out of operative position very quickly. The cushion-blocks 29 normally exert no pressure upon the rolls, but hold them in proper relation to each other. The spacing of the rolls is accomplished by the compression spring devices 26. The cushion-blocks, however, are always in readiness to permit a very hard foreign substance to separate the rolls temporarily until it passes through. The tension of the springs 32 of the cushion-blocks can be regulated by means of jam-nuts 45 on the threaded shafts or screws 35.

From the above description it will be se'en that the parts are exceedingly simple and yet are accurate in their movement and easily adjusted to accommodate the wear of the rolls 4 and 5 and to adjust them when in operation.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is-

l. A crusher comprising a frame, a movable roll mounted therein, movable pillowblocks supporting said roll and having bearings formed therein, caps for said bearings, straps for holding said caps in position, and inclined wedges or keys for holding said straps in position.

2. In a crushing-roll mechanism, the combination of a frame, bearings formed therein, crushing-rolls mounted within the frame, shafts supporting the rolls, and resting in said bearings, caps engaging the said shafts, the frame being provided with apertures upon either side of the bearings, straps inclosing the caps and extending through said apertures, and inclined wedges or keys engaging the straps and preventing their withdrawal from said apertures.

3. A crushing-roll mechanism comprising crushing-rolls, pillow-blocks mounted movably in proper relation to the rolls and provided with bearings for the shafts of the rolls, cap-plates for covering the bearings, the said pillow-blocks having a ertures extending through them upon eac side of the` bearings, straps inclosing the said caps, and extending at their ends through the said apertures, and inclinedl tapering keys engaging the ends of the straps for preventing their withdrawal from the apertures.

4. In a crushing-roll mechanism, the combination with a fixed roll, of a movable roll mounted opposite thereto, rocking pillowblocks carrying the movable roll, jointed supporting members holding the pillowblocks in place, each comprising a rocking portion and a spring-cushion portion the joint being interposed between the said rocking portion and the said spring-cushion, the pillow blocks being thus yieldingly supported against movement in one direction, the movement thereof in the opposite direction being only limited by the fixed roll.

5. A crushing-roll mechanism comprising a frame, a roll mounted therein, an opposing roll also mounted therein, rocking pillowblocks carrying the said roll, a supporting mechanism for the said pillow-blocks made up of cushion-blocks, a rocking shaft and a rocking yoke carried thereby, the said cushion-blocks being carried by the said yoke.

6. In a crushin -roll mechanism the combination with a `xed roll, and a movable roll, of rocking pillow-blocks carrying the movable roll, yielding means supporting the pillow-blocks in position comprising cushion blocks, a transversely arranged yoke carrying the said cushion-blocks and arockshaft supporting the said yoke and capable of moving it back and forth for retracting or advancing the pillow-blocks.

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7. In a crushing-roll mechanism the eoinand means Jfor limiting the movement of the 1o bination of crushing-rolls, pillow-blocks oarsaid pillow-block. rying one of said rolls, a yielding support for In testimony whereof I hereunto affix my said pillow-blocks, the said blocks resting signature in presence of two Witnesses.

n 5 against said support, a transverse rook-shaft 1 mbounted adjacent to the pillow-blocks, a RGBILRT K' HUMPHREY' transverse yoke carried by said shaft, oush- /Vitnesses: ion-blocks mounted upon the ends of said H. E. ALBRIGI-IT,

yoke, one block engaging each pillow-block, F. T. WORTHINGTON. 

